Alaska earthquakes

M4.7 earthquake 107 km SW of Adak, Alaska

A magnitude 4.7 earthquake struck 107 km SW of Adak, Alaska on Thu, Oct 16, 1997, 12:45 PM HADT (21:45 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.0 190 km WSW of Adak, Alaska. This one was a foreshock.

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Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
4.7 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
1997-10-16 21:45:22 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.285° N, 177.868° W
Region
Alaska
Tsunami flag
No
Status
Reviewed by a seismologist

What happened

The USGS’s account of the effects of this earthquake.

Felt (II) at Adak.

From the USGS event page for usp000896k. U.S. Geological Survey text and figures are in the public domain.

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Depth from
OPERATOR_ASSIGNED

Nearby

Within 100 km, magnitude 1.7 and up: 12 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 4.1106 km W of Adak, Alaska · 10574 days ago · 110 km deep · 85 km away
  2. 4.483 km SSW of Adak, Alaska · 10562 days ago · 33 km deep · 45 km away
  3. 4.1156 km WSW of Adak, Alaska · 10556 days ago · 33 km deep · 65 km away
  4. 4.4146 km WSW of Adak, Alaska · 10554 days ago · 33 km deep · 56 km away
  5. 4.7117 km WSW of Adak, Alaska · 10553 days ago · 33 km deep · 29 km away
  6. 4.990 km WSW of Adak, Alaska · 10549 days ago · 33 km deep · 19 km away
  7. 4.5127 km WSW of Adak, Alaska · 10539 days ago · 33 km deep · 21 km away
  8. 4.2137 km SW of Adak, Alaska · 10539 days ago · 33 km deep · 31 km away
  9. 4.683 km S of Adak, Alaska · 10532 days ago · 33 km deep · 78 km away
  10. 4.3152 km SW of Adak, Alaska · 10531 days ago · 33 km deep · 45 km away
  11. 4.7172 km WSW of Adak, Alaska · 10528 days ago · 33 km deep · 82 km away
  12. 5.0190 km WSW of Adak, Alaska · 10522 days ago · 33 km deep · 95 km away

Before

  1. 6.499 km WSW of Adak, Alaska · 10579 days ago · 22 km deep · 16 km away
  2. 4.6136 km WSW of Adak, Alaska · 10581 days ago · 33 km deep · 39 km away
  3. 4.587 km SW of Adak, Alaska · 10583 days ago · 33 km deep · 20 km away
  4. 4.9113 km WSW of Adak, Alaska · 10585 days ago · 33 km deep · 31 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp000896k. Read Thu, Oct 1, 2026, 3:12 PM UTC.